在KeyboardWillShow中同步动画keyboardWillHide - 硬件键盘&虚拟键盘同时 [英] Synchronizing Animations in keyboardWillShow keyboardWillHide -- Hardware Keyboard & Virtual Keyboard Simultaneously

问题描述

所以我有一个带聊天部分的应用程序，我正在同步键盘的动画隐藏和显示聊天的起伏输入。

So I have an application featuring a chat section, and I'm synchronizing the animation of the keyboard hiding and showing with the rise and fall of the chat input.

这是我正在使用的代码：

Here's the code I'm using:

显示：

- (void) keyboardWillShow:(NSNotification *)note {

    NSDictionary *keyboardAnimationDetail = [note userInfo];
    UIViewAnimationCurve animationCurve = [keyboardAnimationDetail[UIKeyboardAnimationCurveUserInfoKey] integerValue];
    CGFloat duration = [keyboardAnimationDetail[UIKeyboardAnimationDurationUserInfoKey] floatValue];

    NSValue* keyboardFrameBegin = [keyboardAnimationDetail valueForKey:UIKeyboardFrameBeginUserInfoKey];
    CGRect keyboardFrameBeginRect = [keyboardFrameBegin CGRectValue];

    // working for hardware keyboard
    //UIViewAnimationOptions options = (UIViewAnimationOptions)animationCurve;

    // working for virtual keyboard
    UIViewAnimationOptions options = (animationCurve << 16);

    [UIView animateWithDuration:duration delay:0.0 options:options animations:^{
        textView.frame = CGRectMake(0, self.view.bounds.size.height - keyboardFrameBeginRect.size.height, self.view.bounds.size.width, -40);
    } completion:nil];

}

HIDE：

- (void) keyboardWillHide:(NSNotification *)note {

    NSDictionary *keyboardAnimationDetail = [note userInfo];
    UIViewAnimationCurve animationCurve = [keyboardAnimationDetail[UIKeyboardAnimationCurveUserInfoKey] integerValue];
    CGFloat duration = [keyboardAnimationDetail[UIKeyboardAnimationDurationUserInfoKey] floatValue];

    // hardware keyboard
    //UIViewAnimationOptions options = (UIViewAnimationOptions)animationCurve;

    // virtual keyboard
    UIViewAnimationOptions options = (animationCurve << 16);

    [UIView animateWithDuration:duration delay:0.0 options:options animations:^{
        textView.frame = CGRectMake(0, self.view.bounds.size.height, self.view.bounds.size.width, -40);
    } completion:nil];

}

这适用于虚拟键盘，但如果是KeyboardWillShow：或者KeyboardWillHide：由于断开或连接硬件键盘而被调用，动画滞后。我可以通过更改UIViewAnimationOptions来解决这个问题

This works great with the virtual keyboard, but if keyboardWillShow: or keyboardWillHide: is called as a result of disconnecting or connecting a hardware keyboard, the animation lags. I can fix this by changing the UIViewAnimationOptions

替换：

// Works with virtual keyboard
UIViewAnimationOptions options = (animationCurve << 16);

使用：

// working for firstResponder keyboard
UIViewAnimationOptions options = (UIViewAnimationOptions)animationCurve;

但有了这个，现在virtualKeyboard动画落后

But with this, now the virtualKeyboard animation lags

我意识到硬件键盘动画并不常见，它可能不是最重要的问题，但我喜欢一切正常工作！

I realize that hardware keyboard animations aren't very common and it's perhaps not the most important issue, but I like everything to just work!

VirtualKeyboard w /（animationCurve<< 16） - WORKING

VirtualKeyboard w/ (animationCurve << 16) -- WORKING

VirtualKeyboard w /（UIViewAnimationOptions）animationCurve - BROKEN

VirtualKeyboard w/ (UIViewAnimationOptions)animationCurve -- BROKEN

HardwareKeyboard w /（animationCurve<< 16） - BROKEN

HardwareKeyboard w/ (animationCurve << 16) -- BROKEN

HardwareKeyboard w / （UIViewAnimationOptions）animationCurve - WORKING

HardwareKeyboard w/ (UIViewAnimationOptions)animationCurve -- WORKING

模拟模拟器中的硬件键盘cmd + shft + k

To simulate hardware keyboard in simulator cmd + shft + k

是的，这可以在真实的情况下复制设备。

Yes, this is replicable on real device.

如果你需要它，这是我的其余代码，仅用于复制目的

In case you want it, here's the rest of my code, just for replication purposes

ADD文字视图

textView = [UITextView new];
textView.layer.borderWidth = 10;
textView.layer.borderColor = [UIColor blackColor].CGColor;
textView.frame = CGRectMake(0, self.view.bounds.size.height, self.view.bounds.size.width, -40);
[self.view addSubview:textView];

UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc]init];
[tap addTarget:self action:@selector(handleTap:)];
[self.view addGestureRecognizer:tap];

// OBSERVE KEYBOARD
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillShow:)
                                             name:UIKeyboardWillShowNotification
                                           object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillHide:)
                                             name:UIKeyboardWillHideNotification
                                           object:nil];

HANDLE TAP：

HANDLE TAP:

- (void) handleTap:(UITapGestureRecognizer *)tap {
    NSLog(@"tapped");
    [textView resignFirstResponder];
}

问题：

这里发生了什么，有没有一种很好的方法来获得一致的动画而不管虚拟/硬件键盘？

The Question:

What is going on here, and is there a good way to get consistent animation regardless of virtual / hardware keyboard?

我意识到这很长，谢谢你的阅读！

I realize this is long, thank you for reading!

推荐答案

由于Apple在键盘通知中发送给你的动画曲线没有相应的UIViewAnimationOption位，你需要下拉到老式非块动画并直接使用曲线：

Since the animation curve Apple sends you in the keyboard notification does not have a corresponding UIViewAnimationOption bit, you need to drop down to old-school non-block animations and use the curve directly:

NSTimeInterval duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
UIViewAnimationCurve curve = [note.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue];
[UIView beginAnimations:@"SomeAnimationID" context:NULL];
[UIView setAnimationCurve:curve];
[UIView setAnimationDuration:duration];
// Animation code
[UIView commitAnimations];

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